*{padding: 0;margin: 0;}
a{text-decoration: none;}
.header-wrap{
    background-color: rgb(40, 38, 84);
}
.header{
    width: 1200px;
    margin: 0 auto;
    line-height: 60px;
    border: 2px solid #fff;
}
.header a{
    color: #fff;
    margin-right: 50px;
}

.doc{
    display: flex;
    width: 1200px;
    margin: 0 auto;
    border: 5px solid #f00;
}
.doc-left{
    width: 900px;
}
.doc-right{
    width: 300px;
    height: 300px;
    background-color: #ccc;
}